It's quite simple saved game editor. Data from saved game file is spread to pages. First page contains info about all players, the second page is used for searcging and editing hero data.
Players Page. On first page you can find infomation about players. In most cases Player 1 is the one you play, but we can also reset computer's gold. For each player following features can be edited: Crystals, Gems, Lumber, Mercury, Ore, Sulfer and Gold. These resources are sued for buying spells, artifacts and hiring heroes. Maximum values for resources are 2,147,483,647 what should be enough for most lazy players :-) I must admit that it's impossible to finish some scenarios without cheats so I use this program in "real" life.
Heroes Page. My guess is that number of heroes is constant but I didn't put all name to one listbox. You must enter hero name in edit box and press Search button. Be aware, some heroes have two names, short and long, you try both if program cannot find a hero. For example if we want hero named "Kastore" we can enter his full name or just a part ("Kas"). After pressing Search button data of hero with most matching name will be displayed on this page. Next search or page changing will store changes.